A few more details: Code will run on M3/M4 arm, like OP said. Code has an optional compiler that uses integers instead of python objects and achieves NEAR C S

A few more details: Code will run on M3/M4 arm, like OP said. Code has an optional compiler that uses integers instead of python objects and achieves NEAR C SPEED. Uses GC with response time of 4 ms. Basic compilation mode is optimized for memory consumption. You can choose which compilation mode per function using decorators. I believe this can run with chips costing around $3 or $4 at the low end, due to memory requirements. It has an easy to use C api. It can run on the netduino+(which is arduino shield compatible). There's a REPL from the PC.